260 ART. 2. — H. MATSUMOTO : 



is extremely wide and squarish. The secondary arm spines, which 



He flat on the arm, are squarish, flat, close-set, mostly soldered 



together, smaller upwards, sixteen to eighteen 



0^^^y^ in number in the free basal arm joints ; they 



I M^^:^^ increase in number with the growth of the 



wm"! m i animal, so that they are fewer towards the 



WS D S^ extremity of the arm, as expected from the 



Fig. 72. Stegopkiura l^W Of localised stagCS. 



sladeni. Side view of DUNCAN doCS UOt mCUtion tllC sizC Of the 



an arm base, x 5. 



type specimen, but judging from the magnifi- 

 cation of his figures, the disk diameter must be about 5 mm. 

 Now, my specimens of corresponding size well agree with Duncan's 

 description and figures. In these young specimens, the lowest 

 secondary arm spine is not very distinctly large, and the secondary 

 arm spines and tentacle scales are apparently similar, forming a 

 continuous series. Again, in Duncan's fig. 11, the primary arm 

 spines are shown to stand apart from the series of the secondary 

 arm spines ; but this is probably due to inaccuracy of observa- 

 tion or drawing. As to the specific identity of the full grown 

 specimens at hand with OpJdura stiphra Clakk, there is no doubt. 

 Thus, my conclusion is that, Ophioglypha sladeni and Ophiura 

 stiphra are merely different stages of one and the same species, 

 the former name having priority. 



JStegophiura hrachyactis (Clark). 



Ophiura hrachyactis: Clark, Bull. U.S. Nat. Mus., LXXV, 1911, p. 

 87, fig. 28. 



Off" southern Saghalin ; 75-100 fathoms (Claek). 



